title: Analysis of a trial randomised in clusters.
authors.affiliation: Division of General Practice and Primary Care, St George's Hospital Medical School, London.
authors.forename: S M
authors.initials: SM
authors.lastname: Kerry
authors.forename: J M
authors.initials: JM
authors.lastname: Bland
mesh_terms: D016000:Cluster Analysis; D016032:Randomized Controlled Trials as Topic